Transmission type screen and method of manufacturing thereof

Abstract

A lenticular lens provided on the viewer side of a transmission type screen is composed of at least two layers, that is, a surface layer and a base layer at least one of which contains a light dispersing material, and a visible light absorbing material is mingled in at least one of these two layers, or in the light dispersing material, thereby enhancing the image contrast of the transmission type screen.

What is claimed is: 
     
       1. A transmission type screen having an incidence side and an emission side, comprising Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises a surface layer (first layer) which is nearest to a viewer and which has substantially a mirror surface and contains a light dispersing material, an intermediate layer (second layer) which does not contain the light dispersing material, and a base layer (third layer) which defines a rear surface and which does not contain the light dispersing material, and further, at least one of said surface layer (first layer), said intermediate layer (second layer), said base layer (third layer) and the light dispersing material contains a visible light absorbing material. 
     
     
       2. A transmission type screen having an incidence side and an emission side, comprising a Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises a surface layer (first layer) which is nearest to a viewer and which has substantially a mirror surface and does not contain a light dispersing material, an intermediate layer (second layer) which contains the light dispersing material, and a base layer (third layer) which does not contain the light dispersing material, and further, at least one of said surface layer (first layer), said intermediate layer (second layer), said base layer (third layer) and the light dispersing material contains a visible light absorbing material. 
     
     
       3. A transmission type screen having an incidence side and an emission side comprising a Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises a surface layer (first layer) which is nearest to a viewer and which does not contain a light dispersing material, an intermediate layer (second layer) which does not contain the light dispersing material, and a base layer (third layer) which contains the light dispersing material, and further, at least one of said surface layer (first layer), said intermediate layer (second layer), said base layer (third layer) and a light dispersing material contains a visible light absorbing material. 
     
     
       4. A transmission type screen as set forth in claim 3, characterized in that said lenticular lens means comprises lenticular lenses and black stripes, and at least either the lenticular lenses or the black stripes are mirror-like. 
     
     
       5. A transmission type screen as set forth in claim 3, characterized in that the absorption spectrum of said visible light absorbing material is substantially uniform over a visible wavelength range. 
     
     
       6. A transmission type screen as set forth in claim 3, characterized in that the light absorptivity of said visible light absorbing material has a visible light absorption spectrum which is in average less than 50% in a wavelength range of 400 to 490 nm, and 30 to 80% in a wavelength range of 490 to 700 nm. 
     
     
       7. A transmission type screen as set forth in claim 3, characterized in that an absorption spectrum of said visible light absorbing material is substantially uniform over a visible wavelength range. 
     
     
       8. A transmission type screen as set forth in claim 3, characterized in that a light absorptivity of said visible light absorbing material has a visible light absorption spectrum which is in average less than 50% in a wavelength range of 400 to 490 nm, and 30 to 80% in a wavelength range of 490 to 700 nm. 
     
     
       9. A transmission type screen having an incidence side and an emission side comprising a Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises a surface layer (first layer) which is nearest to a viewer and which contains a light dispersing material, an intermediate layer (second layer) which contains the light dispersing material by a content which is larger than that in said surface layer, and a base layer (third layer) which does not contain the light dispersing material, and further, at least one of said surface layer (first layer), said intermediate layer (second layer), said base layer (third layer) and said light dispersing material contains a visible light absorbing material. 
     
     
       10. A transmission type screen as set forth in claim 9, characterized in that an absorption spectrum of said visible light absorbing material is substantially uniform over a visible wavelength range. 
     
     
       11. A transmission type screen as set forth in claim 9, characterized in that a light absorptivity of said visible light absorbing material has a visible light absorption spectrum which is in average less than 50% in a wavelength range of 400 to 490 nm, and 30 to 80% in a wavelength range of 490 to 700 nm. 
     
     
       12. A transmission type screen having an incidence side and an emission side, comprising a Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular means comprises a surface layer (first layer) which is nearest to a viewer and which contains a light dispersing material, an intermediate layer (second layer) which contains the light dispersing material by a content which is smaller than that in said surface layer, and a base layer (third layer) which does not contain the light dispersing material, and further, at least one of said surface layer (first layer), said intermediate layer (second layer), said base layer (third layer) and the light dispersing material contains visible light absorbing material. 
     
     
       13. A transmission type screen as set forth in claim 12, characterized in that an absorption spectrum of said visible light absorbing material is substantially uniform over a visible wavelength range. 
     
     
       14. A transmission type screen as set forth in claim 12, characterized in that a light absorptivity of said visible light absorbing material has a visible light absorption spectrum which is in average less than 50% in a wavelength range of 400 to 490 nm, and 30 to 80% in a wavelength range of 490 to 700 nm. 
     
     
       15. A transmission type screen having an incidence side and an emission side, comprising a Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises a surface layer (first layer) which is nearest to a viewer and which has substantially a mirror surface and does not contain a light dispersing material, an intermediate layer (second layer) which contains the light dispersing material, and a base layer (third layer) which contains the light dispersing material by a content which is larger than that in said intermediate layer, and further, at least one of said surface layer (first layer), said intermediate layer (second layer), and the light dispersing material of said base layer (third layer) contains a visible light absorbing material. 
     
     
       16. A transmission type screen having an incidence side and an emission side, comprising a Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises a surface layer (first layer) which is nearest to a viewer and which has substantially a mirror surface and does not contain a light dispersing material, an intermediate layer (second layer) which contains the light dispersing material, and a base layer (third layer) which contains the light dispersing material by a content which is smaller than that in said intermediate layer, and further, at least one of said surface layer (first layer), said intermediate layer (second layer), said base layer (third layer) and the light dispersing material contains a visible light absorbing material. 
     
     
       17. A transmission type screen having an incidence side and an emission side, comprising a Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises a surface layer (first layer) which is nearest to a viewer and which contains a light dispersing material, an intermediate layer (second layer) which does not contain the light dispersing material, and a base layer (third layer) which contains the light dispersing material by a content which is larger than that in said surface layer, and further, at least one of said surface layer (first layer), said intermediate layer (second layer), said base layer (third layer) and the light dispersing material contains a visible light absorbing material. 
     
     
       18. A transmission type screen as set forth in claim 17, characterized in that a light absorptivity of said visible light absorbing material has a visible light absorption spectrum which is in average less than 50% in a wavelength range of 400 to 490 nm, and 30 to 80% in a wavelength range of 490 to 700 nm. 
     
     
       19. A transmission type screen as set forth in claim 17, characterized in that the absorption spectrum of said visible light absorbing material is substantially uniform over a visible wavelength range. 
     
     
       20. A transmission type screen having an incidence side and an emission side, comprising a Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises a surface layer which contains a light dispersing material and a base layer which does not contain the light dispersing material, and further, at least one of said surface layer, said base layer and said light dispersing material contains a visible light absorbing material, and an absorption spectrum of said visible light absorbing material is substantially uniform over a visible wavelength range. 
     
     
       21. A transmission type screen comprising a visible light absorbing material and having an incidence side and an emission side, comprising a Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises lenticular lenses and black stripes, at least either the lenticular lenses or the black stripes are mirror-like, and an absorption spectrum of said visible light absorbing material in said screen is substantially uniform over a visible wavelength range. 
     
     
       22. A transmission type screen having an incidence side and an emission side, comprising Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises a surface layer (first layer) which is nearest to a viewer and which contains a light dispersing material, an intermediate layer (second layer) which does not contain the light dispersing material, and a base layer (third layer) which defines a rear surface and which does not contain the light dispersing material, and further, at least one of said surface layer (first layer), said intermediate layer (second layer), said base layer (third layer) and the light dispersing material contains a visible light absorbing material, and an absorption spectrum of said visible light absorbing material is substantially uniform over a visible wavelength range. 
     
     
       23. A transmission type screen having an incidence side and an emission side, comprising a Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises a surface layer (first layer) which is nearest to a viewer and which does not contain a light dispersing material, an intermediate layer (second layer) which contains the light dispersing material, and a base layer (third layer) which does not contain the light dispersing material, and further, at least one of said surface layer (first layer), said intermediate layer (second layer), said base layer (third layer) and the light dispersing material contains a visible light absorbing material, and an absorption spectrum of said visible light absorbing material is substantially uniform over a visible wavelength range. 
     
     
       24. A transmission type screen having an incidence side and an emission side, comprising a Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises a surface layer (first layer) which is nearest to a viewer and which does not contain a light dispersing material, an intermediate layer (second layer) which contains the light dispersing material, and a base layer (third layer) which contains the light dispersing material by a content which is larger than that in said intermediate layer, and further, at least one of said surface layer (first layer), said intermediate layer (second layer), and the light dispersing material of said base layer (third layer) contains a visible light absorbing material, and an absorption spectrum of said visible light absorbing material is substantially uniform over a visible wavelength range. 
     
     
       25. A transmission type screen having an incidence side and an emission side, comprising a Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises a surface layer (first layer) which is nearest to a viewer and which does not contain a light dispersing material, an intermediate layer (second layer) which contains the light dispersing material, and a base layer (third layer) which contains the light dispersing material by a content which is smaller than that in said intermediate layer, and further, at least one of said surface layer (first layer), said intermediate layer (second layer), said base layer (third layer) and the light dispersing material contains a visible light absorbing material, and an absorption spectrum of said visible light absorbing material is substantially uniform over a visible wavelength range. 
     
     
       26. A transmission type screen having an incidence side and an emission side, comprising a Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises a surface layer which contains a light dispersing material and a base layer which does not contain the light dispersing material, and further, at least one of said surface layer, said base layer and said light dispersing material contains a visible light absorbing material, and a light absorptivity of said visible light absorbing material has a visible light absorption spectrum which is in average less than 50% in a wavelength range of 400 to 490 nm, and 30 to 80% in a wavelength range of 490 to 700 nm. 
     
     
       27. A transmission type screen comprising a visible light absorbing material and having an incidence side and an emission side, comprising a Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises lenticular lenses and black stripes, at least either the lenticular lenses or the black stripes are mirror-like, and a light absorptivity of said visible light absorbing material in said screen has a visible light absorption spectrum which is in average less than 50% in a wavelength range of 400 to 490 nm, and 30 to 80% in a wavelength range of 490 to 700 nm. 
     
     
       28. A transmission type screen having an incidence side and an emission side, comprising Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises a surface layer (first layer) which is nearest to a viewer and which contains a light dispersing material, an intermediate layer (second layer) which does not contain the light dispersing material, and a base layer (third layer) which defines a rear surface and which does no contain the light dispersing material, and further, at least one of said surface layer (first layer), said intermediate layer (second layer), said base layer (third layer) and the light dispersing material contains a visible light absorbing material, and a light absorptivity of said visible light absorbing material has a visible light absorption spectrum which is in average less than 50% in a wavelength range of 400 to 490 nm, and 30 to 80% in a wavelength range of 490 to 700 nm. 
     
     
       29. A transmission type screen having an incidence side and an emission side, comprising a Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises a surface layer (first layer) which is nearest to a viewer and which does not contain a light dispersing material, an intermediate layer (second layer) which contains the light dispersing material, and a base layer (third layer) which does not contain the light dispersing material, and further, at least one of said surface layer (first layer), said intermediate layer (second layer), said base layer (third layer) and the light dispersing material contains a visible light absorbing material, and a light absorptivity of said visible light absorbing material has a visible light absorption spectrum which is in average less than 50% in a wavelength range of 400 to 490 nm, and 30 to 80% in a wavelength range of 490 to 700 nm. 
     
     
       30. A transmission type screen having an incidence side and an emission side, comprising a Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises a surface layer (first layer) which is nearest to a viewer and which does not contain a light dispersing material, an intermediate layer (second layer) which contains the light dispersing material, and a base layer (third layer) which contains the light dispersing material by a content which is larger than that in said intermediate layer, and further, at least one of said surface layer (first layer), said intermediate layer (second layer), and the light dispersing material of said base layer (third layer) contains a visible light absorbing material, and a light absorptivity of said visible light absorbing material has a visible light absorption spectrum which is in average less than 50% in a wavelength range of 400 to 490 nm, and 30 to 80% in a wavelength range of 490 to 700 nm. 
     
     
       31. A transmission type screen having an incidence side and an emission side, comprising a Fresnel lens means on the incidence side and a lenticular lens means on the emission side, characterized in that said lenticular lens means comprises a surface layer (first layer) which is nearest to a viewer and which does not contain a light dispersing material, an intermediate layer (second layer) which contains the light dispersing material, and a base layer (third layer) which contains the light dispersing material by as content which is smaller than that in said intermediate layer, and further, at least one of said surface layer (first layer), said intermediate layer (second layer), said base layer (third layer) and the light dispersing material contains a visible light absorbing material, and a light absorptivity of said visible light absorbing material has a visible light absorption spectrum which is in average less than 50% in a wavelength range of 400 to 490 nm, and 30 to 80% in a wavelength range of 490 to 700 nm.